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Data file describing the biogeochemistry of samples collected at Imnavait Creek ,North Slope of Alaska. Sample site descriptors include a unique assigned number (sortchem), site, date, time, depth, distance (downstream), elevation, and category. Physical measures collected in the field include temperature, conductivity, pH.

As a part of the CSASN project, background (or ambient) specific conductance and stream water temperature was continuously monitored in three streams within the Toolik Inlet watershed from 2010 - 2012 summer/fall seasons. HOBO U24 data loggers were used for data acquisition. The data included in this file is from I8 Inlet stream, 2010 season.

As a part of the CSASN project, background (or ambient) specific conductance and stream water temperature was continuously monitored in three streams within the Toolik Inlet watershed from 2010 - 2012 summer/fall seasons. HOBO U24 data loggers were used for data acquisition. The data included in this file is from I8 Outlet stream, 2011 season.

As a part of the CSASN project, background (or ambient) specific conductance and stream water temperature was continuously monitored in three streams within the Toolik Inlet watershed from 2010 - 2012 summer/fall seasons. HOBO U24 data loggers were used for data acquisition. The data included in this file is from Peat Inlet stream, 2011 season.

As a part of the CSASN project, background (or ambient) specific conductance and stream water temperature was continuously monitored in three streams within the Toolik Inlet watershed from 2010 - 2012 summer/fall seasons. HOBO U24 data loggers were used for data acquisition. The data included in this file is from I8 Outlet stream, 2010 season.

As a part of the CSASN project, background (or ambient) specific conductance and stream water temperature was continuously monitored in three streams within the Toolik Inlet watershed from 2010 - 2012 summer/fall seasons. HOBO U24 data loggers were used for data acquisition. The data included in this file is from I8 Outlet stream, 2012 season.

As a part of the CSASN project, background (or ambient) specific conductance and stream water temperature was continuously monitored in three streams within the Toolik Inlet watershed from 2010 - 2012 summer/fall seasons. HOBO U24 data loggers were used for data acquisition. The data included in this file is from Peat Inlet stream, 2010 season.

As a part of the CSASN project, background (or ambient) specific conductance and stream water temperature was continuously monitored in three streams within the Toolik Inlet watershed from 2010 - 2012 summer/fall seasons. HOBO U24 data loggers were used for data acquisition. The data included in this file is from I8 Inlet stream, 2011 season.

As a part of the CSASN project, background (or ambient) specific conductance and stream water temperature was continuously monitored in three streams within the Toolik Inlet watershed from 2010 - 2012 summer/fall seasons. HOBO U24 data loggers were used for data acquisition. The data included in this file is from I8 Inlet stream, 2012 season.

Data file describing the biogeochemistry of samples collected at various sites near Toolik Lake on the North Slope of Alaska. Sample site descriptors include a unique assigned number (sortchem), site, date, time, depth, and category (level of thermokarst disturbance). Physical measures collected in the field include temperature, electrical conductivity, and pH.

These data are from two remote field campaigns in the Noatak National Preserve. Various thermokarst features and their receiving streams were sampled and characterized. A suite of water chemistry (nutrients, major anions and cations, total suspended sediment) and benthic variables (particulate carbon, nitrogen and phosphorus, and chlorophyll-a) were measured at 6 major sites (2 in 2010 and 4 in 2011). There were additional sites sampled for water chemistry above and below thermokarst features in 2011.

Water samples were taken at 5 locations at both I-Minus2 and Toolik River thermokarst sites (10 sampling locations total). A combination of ISCO and manual grab samples were taken depending on the sampling location and year.

The Changing Seasonality of Arctic Stream Systems (CSASN) was active from 2010 to 2012. The CSASN goal was to quantify the relative influences of through flow, lateral inputs, and hyporheic regeneration on the seasonal fluxes C, N, and P in an arctic river network, and to determine how these influences might shift under seasonal conditions that are likely to be substantially different in the future. During the project, well and mini-piezometer samples were collected from various depths near stream channels and analyzed for a variety of nutrients.

The Changing Seasonality of Arctic Stream Systems (CSASN) was active from 2010 to 2012. The CSASN goal was to quantify the relative influences of through flow, lateral inputs, and hyporheic regeneration on the seasonal fluxes C, N, and P in an arctic river network, and to determine how these influences might shift under seasonal conditions that are likely to be substantially different in the future. During the project, background samples were collected from four stream channels and analyzed for a variety of nutrients.

The Changing Seasonality of Arctic Stream Systems (CSASN) was active from 2010 to 2012. The CSASN goal was to quantify the relative influences of through flow, lateral inputs, and hyporheic regeneration on the seasonal fluxes C, N, and P in an arctic river network, and to determine how these influences might shift under seasonal conditions that are likely to be substantially different in the future. Whole Stream Metabolism was calculated using dissolved oxygen, discharge, stage, and temperature measured by sounds deployed in the field.

To determine temporal and spatial patterns in arctic stream biogeochemistry we conducted three synoptic surveys of streams throughout a 48km2 watershed near Toolik Lake, AK in spring (early-June), summer (mid-July), and fall (mid-September) 2011. During each synoptic survey, we sampled 52 sites within a period of four days to minimize the effect of temporal hydrologic variability. At each site we measured stream temperature, pH, and conductivity and sampled water for solute analysis.

Decadal file describing the physical lake parameters recorded at various lakes near Toolik Research Station during summers from 1983 to 1989. Depth profiles at the sites of physical measures were collected in situ. Values measured included temperature, conductivity, pH, dissolved oxygen, Chlorophyll A, Secchi disk depth and PAR. Note that some sample depths also have additional parameters measured and available in separate files for water chemistry and primary production.

Decadal file describing the physical/chemical values recorded at various lakes near Toolik Research Station during summers from 2000 to 2009. Sample site descriptors include site, date, time, depth. Depth profiles of physical measures collected in situ with Hydrolab Datasonde in the field include temperature, conductivity, pH, dissolved oxygen in both percent saturation and mg/l, SCUFA chlorophyll-a values in both volts and µg/l, and PAR.

Decadal file describing the physical/chemical values recorded at various lakes near Toolik Research Station during summers from 1990 to 1999. Sample site descriptors include site, date, time, depth. Depth profiles of physical measures collected in situ with Hydrolab Datasonde in the field include temperature, conductivity, pH, dissolved oxygen in both percent saturation and mg/l, SCUFA chlorophyll-a values in both volts and µg/l, and PAR.

Decadal file describing the physical/chemical values recorded at various lakes near Toolik Research Station. Sample site descriptors include site, date, time, depth. Depth profiles of physical measures collected in situ with Hydrolab Datasonde in the field include temperature, conductivity, pH, dissolved oxygen in both percent saturation and mg/l, SCUFA chlorophyll-a values in both volts and µg/l, and PAR.

Data file describing the biogeochemistry of samples collected at various sites near Toolik Lake, North Slope of Alaska. Sample site descriptors include a unique assigned number (sortchem), site, date, time, depth, distance (downstream), elevation, treatment, date-time, category, and water type (lake, surface, soil). Physical measures collected in the field include temperature (water, soil, well water), conductivity, pH, average thaw depth, well height, discharge, stage height, and light (lakes).

Data file describing the biogeochemistry of samples collected at various sites near Toolik Lake, North Slope of Alaska. Sample site descriptors include a unique assigned number (sortchem), site, date, time, depth, distance (downstream), elevation, treatment, date-time, category, and water type (lake, surface, soil). Physical measures collected in the field include temperature (water, soil, well water), conductivity, pH, average thaw depth, well height, discharge, stage height, and light (lakes).

Stream discharge, stage height, temperature, and conductivity of Toolik Inlet during the 2005 study season. Water level was recorded with a Stevens PGIII Pulse Generator and water temperature and conductivity with a Campbell Scientific Model 247 Conductivity (EC) and Temperature probe. A Campbell Scientific CR510 data logger logged the data.

Stream discharge, stage height, temperature, and conductivity of Toolik Inlet during the 2006 study season. Water level was recorded with a Stevens PGIII Pulse Generator and water temperature and conductivity with a Campbell Scientific Model 247 Conductivity (EC) and Temperature probe. A Campbell Scientific CR510 data logger logged the data.

This material is based upon work supported by the National Science Foundation under Grants #DEB-1637459, 1026843, 9810222, 9211775, 8702328; #OPP-9911278, 9911681, 9732281, 9615411, 9615563, 9615942, 9615949, 9400722, 9415411, 9318529; #BSR 9019055, 8806635, 8507493. Any opinions, findings, conclusions, or recommendations expressed in the material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.